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GCN Circular 27795

Subject
IPN triangulation of GRB 200521A (short)
Date
2020-05-23T22:36:52Z (4 years ago)
From
Dmitry Svinkin at Ioffe Institute <svinkin@mail.ioffe.ru>
D. Svinkin, S. Golenetskii, R. Aptekar, D. Frederiks, A. Ridnaia,
and T. Cline on behalf of the Konus-Wind team,

K. Hurley, on behalf of the IPN,

A. von Kienlin, X. Zhang, A. Rau, V. Savchenko, E. Bozzo,
and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,

and

A. Ursi, N. Parmiggiani, F. Verrecchia, A. Bulgarelli,
A. Trois, M. Marisaldi, C. Pittori, M. Tavani, Y. Evangelista,
I. Donnarumma, M. Cardillo, G. Piano, G. Minervini, A. Argan,
F. Lucarelli, A. Zoli, V. Fioretti, F. Fuschino, M. Pilia,
F. Longo, A. Giuliani on behalf of the AGILE team, report:

The short-duration GRB 200521A
(AGILE detection: Verrecchia et al., GCN Circ. 27776;
CALET-GBM detection: Yoshida et al., GCN Circ. 27777;
CGBM-SPI-ACS triangulation: Sakamoto et al., GCN Circ. 27790)
has been detected by AGILE (MCAL, SuperAGILE, Anti-Coincidence),
CALET (GBM), Konus-Wind, and INTEGRAL (SPI-ACS), so far,
at about 44201 s UT (12:16:41).

We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
   169.531 (11h 18m 07s)  +7.222 ( +7d 13' 20")
  Corners:
   168.785 (11h 15m 08s)  +5.440 ( +5d 26' 23")
   170.087 (11h 20m 21s)  +9.279 ( +9d 16' 45")
   170.289 (11h 21m 09s)  +8.994 ( +8d 59' 37")
   168.987 (11h 15m 57s)  +5.152 ( +5d 09' 08")
  ---------------------------------------------
The error box area is 1.14 sq. deg, and its maximum
dimension is 4.27 deg (the minimum one is 16.9 arcmin).
The Sun distance was about 106 deg.

This box may be improved.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB200521_T44201/IPN/

The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.
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